Predecessor of the LTZ1000
Added 2018-09-27 19:49:13 +0000 UTCNot quite as compact, but a few more independent voltage references AND a lot of unpopulated spots in this beast. It's basically a precision oven, that tries to stay at 30 +/-0.1 °C to keep the weston cells happy. It needs a proper restoration tho, I've already found 1 electrolytic cap from 1986 😅
Comments
You swapped the cells for LTZ1000 in the oven? Cool
Rick B
2019-10-29 03:31:29 +0000 UTCOh yea, these guys are super sensitive. I've hinted vaguely at the current occupation of this thing in the 'low voltages with old keithleys'-vid ... it now contains the 2 LTZ1000 references which are powered on continuously until I find a new job for them :)
Marco Reps
2019-10-28 17:01:27 +0000 UTCWhat are you doing with that beast nowadays? I just received a second Standard Cell oven so I can calibrate my own stuff. They don't like being measured by voltmeters unless they have +10M impedance. I accidentally hooked one cell up wrong to a calibrator and it dropped the voltage output down by over 1mV. It will likely take weeks to fully recover. They must never flow any electrons of current. My Keithley 181 loves to measure it.
Rick B
2019-10-28 16:36:15 +0000 UTCThe AllSpark is the source of life for all Transformers. And bougie is just a fancy word for.. fancy. Lol.
Euclid
2018-10-01 11:25:14 +0000 UTCI will definitely compare the 2, but I think the weston cells have a non-zero-self-discharge rate, so they god bad, semiconductor LTZ1000 can theoretically live forever
Marco Reps
2018-10-01 07:19:15 +0000 UTCI didn't know what AllSpark was, but 'mahogany oven' was amusing enough :)
Marco Reps
2018-10-01 07:14:01 +0000 UTCHope I don't accidentally spend all my money on teflon cables and copper lugs now :L
Marco Reps
2018-10-01 07:12:28 +0000 UTCIs this how the AllSpark came to earth? In a bougie mahogany oven.
Euclid
2018-10-01 04:26:55 +0000 UTCI see your volt-nut disease is more advanced than I had at first thought. Welcome to the fold :)
Jason Pepas
2018-09-30 10:40:57 +0000 UTCThat is really exotic. Interesting to learn how it's performance would compare to a LTZ1000.
Alex W
2018-09-28 19:20:38 +0000 UTCI was thinking about calling it a time machine for aging parts, but yours is almost irresistible too
Marco Reps
2018-09-28 07:03:55 +0000 UTCI think you should say something about hacking the mainframe and cutting the red wire while dismantling this thing.
Morten Hanasand
2018-09-28 06:08:21 +0000 UTCYeah so many layers of foam and screws. I always wonder when I see these precision instruments how they created the first one and how do they know it was precise?
John McCormick
2018-09-27 20:02:44 +0000 UTCToo easy! I like to wait a few days before my voltage reference is ready to go
Marco Reps
2018-09-27 20:02:05 +0000 UTCWelcome back, you have been missed! It is also very smelly, with all that PU foam anno 1986. But at least it's not disintegrating
Marco Reps
2018-09-27 20:01:03 +0000 UTCHowever for quick testing purposes I use one of those boards: <a href="https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.it%2Fulk%2Fitm%2F122680439822" rel="nofollow noopener" target="_blank">https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.it%2Fulk%2Fitm%2F122680439822</a> . They are pretty stable and precise if you close them into appropriate enclosure and power with batteries and wait for a suitable warm up time...check it out Marco!
Giovambattista Currado
2018-09-27 19:59:50 +0000 UTCGreat vintage gear!
Giovambattista Currado
2018-09-27 19:57:08 +0000 UTCSo screwy
John McCormick
2018-09-27 19:57:02 +0000 UTC
